2017
DOI: 10.3390/en11010027
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Improving Transient Response of Power Converter in a Stand-Alone Microgrid Using Virtual Synchronous Generator

Abstract: Multiple power converters based on the droop controllers have been used widely in the microgrid (MG) system. However, owing to the different response time among several types of power converters such as grid-feeding and grid-forming converters, low frequency oscillation occurs with high overshoot in the transient state. This paper proposes a novel control strategy based on the virtual synchronous generator (VSG) for improving transient response of parallel power converters during large disturbance in the stand… Show more

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Cited by 18 publications
(10 citation statements)
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“…In this structure, the grid-forming converter is adopted to regulate the active power and support the system frequency by using the VSG control. The advantages of VSG control for supporting system frequency by imitating both steady-state and transient-state characteristics of the synchronous generator are explicitly discussed in previous works [24,25]. Therefore, it will not be further considered in this paper.…”
Section: Overall Structurementioning
confidence: 99%
“…In this structure, the grid-forming converter is adopted to regulate the active power and support the system frequency by using the VSG control. The advantages of VSG control for supporting system frequency by imitating both steady-state and transient-state characteristics of the synchronous generator are explicitly discussed in previous works [24,25]. Therefore, it will not be further considered in this paper.…”
Section: Overall Structurementioning
confidence: 99%
“…When disturbances occur in the microgrid, conventional SGs can provide seamless power support by virtue of the mechanical characteristics of their own rotors, enabling early frequency support before primary adjustment. Considering the natural advantages of rotor characteristics and the coordinated operation between inverters and traditional SGs, it is proposed to add virtual rotor inertia and damping characteristics on the base of droop control, namely the virtual synchronous generator (VSG) control strategy [14][15][16]. The power generation of the distributed microgrid is composed of multi-parallel VSGs, forming an N+1 redundancy mode, which improves the redundancy and reliability of the microgrid in terms of the structure and makes up for the deficiency of the centralized microgrid.…”
Section: Introductionmentioning
confidence: 99%
“…By introducing the rotor swing equation, the virtual inertia and primary frequency regulation instructions were conceived to simulate the external characteristics of the SG using this concept. The VSG can increase the inertia of the inverter and improve the system output response [6][7][8][9]. Although the VSG is equivalent to the traditional synchronous generator in terms of output characteristics, it is still difficult to maintain system stability under high transient conditions.…”
Section: Introductionmentioning
confidence: 99%